Chapter 8. Atom Publishing Protocol

IN THE PRECEDING CHAPTER WE LEARNED ABOUT ATOM, a hypermedia format
for publishing timestamped lists of web content. We then successfully
applied that format to creating an event-driven system, typical of both
enterprise and Internet computing, where events published by one system as
an Atom feed were consumed and processed by downstream systems.

In this chapter, we’re going to look at Atom Publishing Protocol
(AtomPub), a protocol that is built on top of Atom, and which is used for
publishing and editing web resources.[86] As a publishing protocol, AtomPub provides a standard
mechanism for creating and editing resources, and resolving any arising
conflicts. AtomPub extends the Atom format with a number of new
publishing-related elements; at the same time, it specifies the HTTP
idioms that can be used to manipulate published content.

Once we’ve understood AtomPub, we’ll look at how it can serve as a
foundation for our own domain application protocols. In the second half of
the chapter, we show how Restbucks built an order fulfillment protocol and
service atop AtomPub.

Note

In Chapter 5, we used custom domain
application protocols. AtomPub is a general-purpose domain application
protocol, which is widely understood and supported by many software
tools.

Atom Publishing Protocol

Resources can be created on or off the Web. Resources that are generated by a backend process inserting a row in a database table are created off-Web. Atom Publishing Protocol, ...

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